Tip-tap-tip -

"Tip-Tap-Tip" (often extended as "Tip-Tap-Tip-Tap") appears in various literary and musical pieces, most famously in children's literature and rhythmic songs. Key Cultural References

: The Japanese pop duo released a song called "Tip Taps Tip," which served as the third ending theme for the anime series Eureka Seven . Tip-Tap-Tip

: In Beatrix Potter's 1903 story, The Tailor of Gloucester , the tailor hears the "tip tap, tip tap, tip tap tip!" of mice working under tea-cups as they help him finish his work for Christmas morning. The Tailor of Gloucester